| 摘要 |
PURPOSE:To obtain the titled high-quality fiber having excellent thermal characteristics and physical properties and giving a knit or woven union fabric having high stretchability when combined with other fibers, by melt-spinning a polyether (ester) amide polymer having a specific composition and drawing the spun fiber at a specific draw ratio. CONSTITUTION:The objective fiber can be produced by melt-spinning a polyether (ester) amide polymer derived from (A) the diamine of formula (R is 1-4C alkylene or alkylidene; R1 and R2 are H or CH3) (e.g., 4,4'-diamino dicyclohexylmethane), (B) 6-15C aliphatic or alicyclic dicarboxylic acid (prefer ably sebacic acid, etc.) (equimolar amount to the component A), (C) a poly (alkylene oxide) glycol and/or poly(alkylene oxide) diamine having a number- average molecular weight of 300-2,000 [preferably poly(tetramethylene oxide) glycol] and (D) a 4-20C dicarboxylic acid, cooling and solidifying the spun fiber and drawing the fiber at a draw ratio larger than 0.5 times the breaking elongation of the elastic fiber.
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